Hi Daniel,
maybe also of interest for the discussion: https://phabricator.mitk.org/T11113?
Best,
Stefan
________________________________
Von: Daniel Maleike <c...@maleike.de>
Gesendet: Montag, 21. August 2017 17:58
An: mitk-users@lists.sourceforge.net
Betreff: [mitk-users] Loading tiny triangle mesh violates assertion in
SlicedGoemtry3D
Dear MITK users,
I came across a violated assertion in SlicedGeomtry3D and wanted to see if
anybody has seen similar problems with very small (tiny extent) data sets. Has
anybody already considered possible solutions or expected behavior?
When you load attached polygon file (triangles of very small extent) into
Workbench, you will find that SliceNavigationController tries to initialize a
SlicedGeometry3D [1]. SlicedGeometry3D will then calculate that it requires 0
slices [2] (which seems suspicious).
A couple of lines later, SliceNavigationController initializes a
ProportionalTimeGeometry using the previously generated SlicedGeometry3D.
ProportionalTimeGeometry will then clone the specified SlicedGeometry3D and run
into the violated assertion at [3] which requires non-empty sliced geometries.
I am not yet sure which is right: should SlicedGeometry just stop
initialization when it finds itself with zero slices? Or should cloning of
evenly-spaced geometries with 0 planes be accepted? Or should SlicedGeometry
always create at least one slice unless the extent is really zero?
If anybody has thoughts on this behavior, I'd be happy to discuss. I would like
to avoid the violated assertion and ideally also be able to see something when
loading this data set.
Kind regards,
Daniel
[1] for the attached file: call to InitializePlanes in line 279 of
mitkSliceNavigationController.cpp
[2] mitkSlicedGeometry3D.cpp line 253
[3] mitkSlicedGeometry3D.cpp line 51
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